import random


def mobile_random():

    return "1" + str(random.randint(3, 9)) + "".join([str(random.randint(0,9)) for i in range(9)])


def mobile_random_1():
    mobile = "1" + str(random.randint(3, 9))
    for i in range(9):
        a = str(random.randint(0, 9))
        mobile += a

    return mobile

def mobile_random_3():
    a=[]
    for i in range(9):
        i = str(random.randint(0,9))
        a.append(i)
    mobile = "1" + str(random.randint(3, 9)) + "".join(a)
    return mobile


if __name__ == '__main__':
    print(mobile_random_1())
    print(mobile_random_3())
    print(mobile_random())

